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Mathematics in the first grade of primary school is prone to mistakes.
Second, fill in the blanks:

1. The RMB has () angle, () angle and () angle. Renminbi (), () and ().

2. A two-digit number, where the number in the tenth digit is 6 larger than the number in the single digit, and the number in the single digit is less than 1. This two-digit number is ().

3. 100 is (); 1 is at () position, which means () ().

4. The nearest integer to 34 is ().

One digit of five. 74 is (), which means (), and the decimal number is (), which means ().

6. There are () numbers greater than 10 and less than 20, and the number with the same single digit and ten digits is ().

7. Write three two-digit numbers () () with zero digits; Write three two-digit numbers () () () with nine digits. Write three two-digit numbers () () with the same single digit and ten digits.

8. Two identical cubes can be combined into a body (); At least () identical small cubes can be put together to form a big cube; At least () identical small squares can be combined into one big square.

9. On the clock face, 1 scale is 1 scale, and scale 5 is scale 5.

10.60 write (), which is smaller than the two digits of ().

1 1.39 The number before it is () and the number after it is (). The two numbers adjacent to 99 are () and (). The third number after 28 is ().

12. Hundreds of 1 more than ten 1 ().

13. I passed () and the car passed ().

14. A square piece of paper is folded twice and then unfolded, and a * * * can get () small squares; A * * * has () squares.

15. One digit is (); The smallest two digits are (); The two digits of are (); The smallest three digits are ().

The difference between the continuous subtraction of 16.80 4 is: (), (), (),

The four numbers before 17 and 80 are (), (), () and () respectively.

18. On the clock face, the minute hand points to 12, and the hour hand just passes 5. The current time is (:), which can also be expressed as (hours).

19.7. 10 yuan = () yuan () angle; 0.50 Yuan = () Yuan () Jiao; ; 2 hours = () minutes

20. List four formulas with the following three numbers. 15 10 5 _ _ _ _ _ _ _ _ _

2 1. Xiaoming does 30 questions, Xiaohong does 34 questions and Xiaohua does 80 questions. Xiaoming is less than (), and () is much more than Xiaoming.

22. Arrange 48, 39, 73, 32 and 55 inches from small to large. □& lt; □& lt; □& lt; □& lt; □. Among them, () is greater than 40, () is less than 50, and () is both greater than 40 and less than 60.

23. Write the number before 79 and the two numbers after 79 one by one. ()、79、()、( )

24. Count 1 10, and write down two figures before and after 80. ()、( )、80、( )、( )

25. A two-digit number, the number on the digit is 6, and the number on the tenth digit is 2 more than the number on the digit. This number is ().

26. 12 is 4.78 less than (). There are () ones and () tens in it.

27. Fill in the first three digits of 90 in the order of () ().

28. More than 1 1 and less than 15. Is a singular number () greater than 60 and less than 70, and the unit is 5.

29.39 plus 1 is () ten. 39 plus 1 Yes ().

30.70 is 1 greater than (), 1 less than (), 1 greater than (), 1 less than 70.

3 1. Write three four-digit numbers in descending order. ( )、( )、( )

Write three numbers with a decimal number of 4 in descending order. ( )、( )、( )

32. What's in ()? 9+( )( )+ 10

What is the smallest number in ()? 35+3 & lt; () 17-()& lt; 10

33. The smallest three digits are different from the two digits in ().

34.25 plus () will be 30.

35. Starting from 80, count dozens of tens, and then count () ten is one hundred. Seven tens plus () ten is 100.

36. Doudou's father is 37 years old, and Tao Tao's father is about the same age as Doudou's father. How old is Tao Tao's father this year?

39( ) 50( ) 25( )

37. Two digits are (), and the smallest two digits are ().

38. 12-5=()-7, 17-8= 15-( )

39.45、5 1、85、37、55、95、58

The two digits in the unit of 5 are: ()

Ten digits are five, and two digits are: ()

40. 1 The number less than two digits is (). There are () two-digit numbers with unit of 2.

4 1. 1 Zhang Yiyuan RMB can be exchanged for () RMB with 50 cents and () RMB with 1 cent.

In Zhang Yiyuan, one yuan can be exchanged for () 50 yuan yuan. You can also change it to () 1 RMB.

42.5=( )-5 ( )- 6 = 3 + 6 ( )+ 6 = 5 + 9

43. A Football 46 yuan, Xiaoming: I only have enough money to buy a football. I have () ten yuan at most?

Xiaohong: I paid for all ten yuan of football. I paid the () ticket?

44. One 50 yuan can be exchanged for () one 20 yuan and () one 10 yuan.

45. A 100 yuan note can be exchanged for () a 20 yuan note or () a 10 yuan note.

46.26 Angle = () Yuan () Angle 100 minute = () Yuan 3 yuan 6 Angle = () Angle.

47. The sum of its unit and the digits in the decimal digit is 9, which may be (), () and ().

A number with two digits greater than the tenth digit may be (), (), ().

Its ten digits are 2 larger than the digits. This number may be (), (), ().

48.88 The left 8 is in the () position, indicating (), and the right 8 is in the () position.

Means () ().

49. The unit is 5, and the decimal number is 3 or ().

Third, multiple-choice questions:

1. The price of a basketball is () A: 68 minutes B: 68 yuan C: 68 cents.

2. The price of a dictionary is () A: 8 yuan 2 jiao B: 8 jiao 2 fen C: 82 fen.

3.2 cents can be converted into () 5 cents. A: 1 b: 2 c: 4

Fourth, solve the problem:

1. Liang Xiao spent 60 cents on an exercise book. He paid 1 yuan. How much should he get back?

2. Xiaohong spent 90 cents on stationery, leaving 1 yuan 1 cent. How much money does she have?

3. Xiaolan 2 yuan has 5 cents, and 0 yuan has 65438+2 cents. How much is left?